Cutter-guard for planing-machines.



J. A WOODFORD.

CUTTER GUARD FOR PLANING MACHINES.

APPLICATION FILED MAB. 9, 1914.

Patented M126, 1915.

WITNESSES THE NORRIS PETERS CO). PHOTG-LITHO, WASHINGTON. D. c.

UNITED STATES PATENT OFFICE.

males A. wooffiis oitngor oHIo, Ae is-fies 0a bNii-THIRD To DEXTER B. STEPHENS, or YOUNGSTOWN, OHIO.

oewmaieuras res amaamcmars.

Specification 6f Letters Patent.

Patented Jan. 26', 1915.

Applicatiomfiled'fiarch 9, 1914. Serial No. 8323;61'8.

To all whom it may concern 1 1 Be it known that I, JAMns A. W'oonronn, residing at Youngstown, inv the county of Mahoning and State of Ohio, a citizen of the United States, have invented or discovered certain new and useful Improvements in Cutter-Guards for Planin -Machines, of which improvements the ollowing is a specification.

The invention described herein relates to an improvement in wood planing machines and has for its object the provision of a guard for the revolving cutter, adapted to be shifted by the piece to be planed as it is moved into operative relation to the cutter and to return automatically to guarding position as soon as the piece has passed beyond the cutter. The invention is hereinafter more fully described and claimed.

In the accompanying drawings forming a. part of this specification, Figure 1 is a top plan View of a planer of the surfacing type having the improvement described herein applied thereto; Figs. 2 and 3 are transverse sections on planes indicated respectively by the lines 11-11 and III-III Fig. 1.

For convenience the improvement is described in connection with a planing machine of the surfacing type, which consists of a shaft 1 provided with a head 2 carrying suitable cutters 3. The board or other article is supported while being operated on by the cutters by a suitable bed formed of sections 4: and 5, which as customary may be independently adjusted by wedges 6 or other suitable means. When applying the improvement to this type of machine, a block 7 is attached by suitable means to the frame of the machine in such relation to the out ters that the guard supported by the block as hereinafter described may be readily moved into andout of operative relation to the cutter. In the type of machine shown herein having horizontally arranged cutter shafts 1, the carrying block 7 which is provided with guides 8 for the guard is so supported that the guard will move in a plane parallel with the shaft and immediately above the slot in which the cutters rotate. The guard consists of a' frame 9 the outer edges of which engage the guides 8 and a concaveconvex strip of metal 10 secured at its edges to the sides of the frame.

Suitable means are provided for shifting the guard across the planer table so as to cover the cutter revolving in the slot between ad acent ends of the table sections, and to permit of its being shifted from above the cutters preferably by the board or other article to be planed. A suitable construction to this end consists of a toothed wheel 11 adapted to engage a series of teeth on one of the side bars of the frame 9. The shaft of the wheel 11 is connected to one end of a coiled spring 12 arranged in a recess in the upper side of the block 7 and having its opposite end secured to a fixed pin 13. This spring is so arranged as to shift the guard forward to prevent access to the cutter and to yieldingly hold it in'such position. While the guard may be shifted to permit access to the cutters by any suitable means, it is preferred that such movement should be effected by the board or other article and to this end the guard is provided with an arm 14 so shaped and arranged on the feed side of the planer, that a board while being moved along the table will bear on the arm and shift the guard from over the cutters for a distance equal to the width of the surface to be planed. This guard will also serve to hold the work laterally in position. As soon as the board has passed beyond the cutters the guard will be automatically returned to protecting position. The rear edge a of the guard should be as nearly as possible in vertical alinement with the rear edge 6 of the slot in which the cutter rotates, so that the guard may move to protecting position immediately on the passage of the rear end of the board from above the cut ters.

I claim-herein as my invention:

1. A wood planing machine having in combination a supporting table provided with a transverse slot, a revolving cutter opcrating in said slot, a. guard movable parallel with the slot and closely adjacent to the surface of the table, and provided with a series of teeth, a pinion engaging said teeth, and a coiled spring for rotating said pinion.

2. A wood planing machine having in combination a supporting table provided with a transverse slot, a revolving cutter operating in said slot, a plate provided with guides attached to the table in line with the slot lying approximately in the plane of the surface of the table, a pinion carriedby the guide plate, a spring for rotating the pinion,

the pinion, a guard mounted in said guides and provided with teeth adapted to engage the pinion, and a curved arm extending from the inner end of the guard on the feed 15 side of the planer across the table.

In testimony whereof I have hereunto set my hand.

' JAMES A. WOODFORD. Witnesses:

H. H. WICKHAM, LENORE FLEMING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

